EFFECTS OF LOW-GRADE COKE ON THE OPERATION OF AN EXPERIMENTAL BLAST FURNACE.

The gasification reaction is not only accelerated but also localized to the surface zone of coke particles by catalytic action of alkali; acceleration and localization are more in the ordinary coke whose initial porosity is smaller; localization seems to reduce the degradation of each coke particle, but it magnifies the difference in the degradation between the two grades of coke. Gasification with CO//2 in a high-temperature region near the raceway could be one of the main causes that led to the severe disintegration of low-grade coke.